The House, M.D. episode in which House and Amber hallucinate after a bus accident is titled “House’s Head.”
“House’s Head” is the first part of a two-episode season-four finale, followed by “Wilson’s Heart.” After a night of drinking, House is involved in a bus crash and realizes that an important memory is missing. He tries to reconstruct the events leading up to the accident, including the identity of a person who may need urgent medical attention.
The episode uses hallucinations and fragmented recollections to place viewers inside House’s damaged memory. Its mystery is not only the medical condition connected to the crash but also what happened before House boarded the bus. The conclusion continues directly in “Wilson’s Heart.”
The title is sometimes mixed up with the second episode because both form one storyline. “House’s Head” focuses on House’s search for the missing memory, while “Wilson’s Heart” deals with the consequences for Amber and Wilson.